Valve



Sept. 29,` 1925. w 1,555,025

' F. E. RAYMOND VALVE Filed July 21. 1923 PatentedSept. 29, 1925.

UNITED srArEs PATENT oFFlct-z.

FAIRIELD E. rumem), or Bos'roN,

GAGE AND VALVE co., or BosroN, cnusnr'rs.

MAssAoHUsrrs, AssIGNon 'ro enosBY 8mm mAssAcnUsE'rrs, A CORPORATION orf Massa- VALVE."

Application flled J'uly 21, '1923. Serial No. 652,930.

perfect seatingof the disc with the least` wear upon the seating surfaces' The invention is illustrated by the accompanying drawings inwhich: Figure 1 is a Vertical, central, cross-sectional view of the disc seated;and Fig. 2 is a similar view of the disc raised from its seat.

The disc 1 is furnished with the peripherally disposed and downwardly projected annulus 2, which'is furnished with the circumferential groove 3, the lower' walls 4 of which are bevelled in opposite directions, the lower inner wall terminating in the curved portion 5 of the annulus 2.

The seat 6 comprises an annulus furnished with the circumferentia'l groove 7, the top 8 of the seat being rounded and its exterior walls 9 being bevelled.

The disc and seat are so proportioned and relat-ively disposed that The normal, lineal, annular seatings are at 10 near the lower resilient end of the bevelled portion. 4 of the disc and at 11 midway of the less resilient bevelled portion of the seat.

The groove 3 is relatively deep and broad to produce 'a corresponding degree' of resiliency in the disc and to firrnly clasp or vclutch the seat.

The groove. 7 is comparat-ively shallow and narrow to produ'ce a seat resilien't at the top hut afi'ording a rigid support below the top not liable to be distortedas disc and seat are firmly forced together in closing.

The curved portion 5 of the disc and the curvedportion 8 of the seat serve to secure a venav contact-a, thereby causing the jet of fluid to pass directly over the seating sur- .of the diameter 13 of the seat and the seat having zfaces without abrasion, as these surfaces are removed from fluid.

Disc 1 and seat 6 act in the' direction of their common axis in opening and closing the passage between them.

The bevels of the disc and seat are ofdifferen'tangles, that of the disc being the lesser;` -so that the contacts between them, normally lineal, develop int'o zones ofa width proportional to the excess of pressure exerted upon the disc over that beneath it, and all without shouldering or distortion- By thus the impact and flow of the providing for a double seating (10 and 11) `of the disc on the seat and furnishing the disc and seat With resilient grooves as described, a much better seating of the disc is obtained than would otherwise be possible.

Disc l in receding from seat 6 lea-ves a pjassage 12 between their nearest surfaces of a diameter greater than one quarter (1A) port 14.

I claimz- 1. In a valve of the character described a disc and a seat having a common Vertical v'axis and furnished with bevelled seating surfaces and interior grooves in 'a plane perpendicular to the axis: the bevel of the disc being of lesser angle than that of the seat.

2. In a valve of the character described a i disc and a seat having a common'vertical axis; the disc being furnished with a downwardly projected, interiorly grooved and bevelled annulus; and the seat having a rounded. interiorly' grooved top and being exteriorly bevelled; the -diameter of the groove of the disc being greater than that of the groove of the seat; and the bevel of the disc being of lesser angle than that of thelseatu 3: In a valve ofl the character described disc and a'seat having a common Vertical axis; the disc being furnished With a downwardly projected, interiorly grooved and bevelled annulus curved at the bottorn; a rounded, interiorly grooved top and being exteriorly bevelled; the diameter of the groove of the disc being greater-than that of the oove of the seat; and the bevel of the isc being of lesser angle than that of the seat.

4. In a valve of the character described a valve disc havin a downwardlyflprojected interiorly groove and bevelled annulus, and a valve seat having a cooperating annular 'portion bevelled exteriorly at a greater angle than the bevel of the disc and having' a circumferential groove formed in the top which is comparatively narrow and shallow in depth, the relative diameters of the contacting bevelled portions of the disc and seat being such that the lower edge of the disc -engages with the bevelled portion of the seat adjacent the 'bottom portion of the annular groove.

FAIRFIELD E. vRAYMOND. 

